Steam generator



Oct. 1 1 1927.-

J. R. EVANS` STEAM GENERATOR Fil'ed April lo, 1924 2 Sheets-Shee. l.

'l lll/1111111 f ww Patented Oct. 1l, i927..

Unirse stares parent orricn.

JOHN R. EVANS, 0F VJINDSOR, ONTARIO, CANADA, ASSGNOR OF `ONE-Ol'IIEt'lH T0 BENJAMIN lV. TANZY, OF BETROT, lllfCIt-IIGLA.k

STEAM GENERATOR.

Application filed April 10, 1924.`

' x My invention relates to an improvement in steam and hot water generators shown in the accompanying drawings and more particularly described in the following specification and claims.

One of the objects of this invention is to provide a simple and inexpensively con structed furnace and steam generator adapted to readily convert water into steam for heating or power purposes, which is adapted to minimize and eliminate the possibility of explosion and which may be employed as a hot water heater if desired.

A. further object of the invention is to provide an apparatus economical in fuel consumption in which steam may be rapidly generated and superl1eated,-the construction being such that the water delivered from the main may be preheated before entering the coils in which steam is generated.

A further object of the invention is to provide a construction in which theheating coils may be readily and quickly removed for repairs when necessary without seriously hampering its service when repairs are required. y

One feature of theuinvention consists in a plurality of vertically disposed inclined heating coils connected at their lower ends.

with a manifold from which a steam pipe leads to the heating system, the condensation from the radiators or heatingV system being returned by gravity to a. tank elevated above the boiler g-the condensation passing 'by gravity from t-he tank; to an upper manifold connected through a plurality of valve controlled sight feed7 tubes withthe upper ends of the respective heating coils contained within the walls ofthe furnace.

Y Another feature of the invention consists in providing the furnace with a divided or sectional front which may be readily detached as required, whereby the several vertical coils contained within the furnace may be veasily and quickly removed foi1 repairs when necessary. i

Another feature of the invention consists in providing a plurality of sight feed tubes in line with nipples -or feed pipes extending from the upper manifold to the coils whereby, the condensation delivered to the hea-ting coils may be observed and regulated.

the furnace.

figure 2 is avertical cross-sectional view Serial No. 705,423.

Vith the foregoing and other objects in view which will appear as the description proceeds the invention further resides inthe combination and arrangement of parts and in the details of construction hereinafter described and claimed it being understood that changes may be made inthe precise embodiment of the invention herein disclosed without departing from the spirit of the same. ln the drawings accompanying this specification:

Figure l is a front elevation' o-f the furnace showing fragmentary sections of two floors of a building with radiators connected by return pipes to an elevated tank from which the condensation is delivered to an upper manifold and thence to the coils of through the furnace showing the piping system connecting the furnace with the radiators of two floors. of a bu.ildingand from the radiators to an elevated tank Vfrom which the condensation is delivered by gravity back to the heating coils inV thefurnace.

- Figure 3 is a rear elevation of the furnace with a pipe connection leading from the of a building also a pipe' connection leading from said manifold to a tank elevated above the boiler from which the condensation passes by gravity to the heating coils.

Figure 4 is a detail sectional view showwhich the condensation passes from the upper manifold to the respective heating coils. Figure 5 is an elevation of' one of the ,heating coils.

lower manifoldto the radiators of two floors ing the sight feed glass tubes through l' Referring now tothe' letters of-reference placed upon the drawings: i,

A denotes a furnace and A1 indicates the smoke stack leading from the furnace.'

B Yrepresents 'thevr divided front wall of the furnace formed in section b, bolted at b1 to the frame that ready access may be obtained to the interior of the furnace for the purpose of removing and replacing a plurality of coils housed therein.

C designates a furnace door of struction and D an ash pit door.

E denotes the usual grate bars.

F indicates a pipe leading from the water usual icon-j f main under control of a valve Fa-fto aT- manifold H by aplurality of nipples LL.

KEL designates valves controlling the delivery of water through the sight feed tubes. Kl denotesv a nozzle thro-ugh which the water :i is allowed to drip or ilojv in a relatively small stream down through the Csight reed tubes to the res aective heating coils.

M indicates a supporti bracket provided with pipe fittings ii/ll ove and beiowfor the aassaoe of water from the man "o D through the nipples connecting the 4sight feed 'tubes to the res'acctive cons.

It will be noted that suppe g bracket M is diaOraminaticalli indicatiJe Figure ll, it being evident that any si device may be employed which. will` serve asa connecting support for tie respective pipe ends. w

Horizontally interposed between the water heating coils l, are a plur ry of 'saine plates N serving to divert the hot gases back and forth over the heating coils.

O represents a'steam pipe leading from the lower manifold J -controlled b a valve 7 Oa -extendins unwardl through the sev- 7 i; l Y o eral floors and connected` with the radi ators P. P designates shut-off valves ada )ted to D cut off the delivery of steani to the respective radiators. p

R denotes a return pipe connected with the respective radiators l) through which the condensation or steam is returned to a tank S suitably eievated above the top of the boiler. S indicates a Uauge glass for deter- ?D D D mining the level of condensation in the tank. vT represents a pipe for delivering the condensatioii from the tank S, to the upper manifold H, from which it passes to the sight feed tubes K, and thence to the Vcoils I. i

lU designates a pipe leading from the lower manifold J to the tank S, and is fitted lwith a trap Usu and a valve b controlling the passage of condensation to the tank. vUc denotes a ypipe leading from the trap Ua to avsewer or other point of discharge, controlled by 'a valve Ud. V indicates ya pressure gauge connected by a pipe V2L ith the lower manifold il.

W represents a pipe leading froml a shaped iitting connected with the lower manifold to a suitable blow-oil? or relief valve Wa, thereby providing against eXcesV sive pressure.- I

Having now indicated the several parts by reference letters the construction and operation of the device will be readily understood.

vWater is primarily admitted to the heating coils,-or when necessary to replenish same from a water main through the valve Illa to the coils G, upon opening the valve Fa. The water is here preheated before delivery to the upper manifold H, from which it passes to the respective sight feed tubes K, where its feed is controlled by the valves Ka, and thence to the heating coils I, where it is rapidly converted into steam the water flows down the coils toward the body of the fuel supported upon the grate bars. 'illie steam passes into the lower manifold l and is carried bythe pipe U upwardly to the several radiators l on the L respective floors of the building,tlie con densation from tiie radiators flowing by gravity back through thepipe R to the tank S located above the furnace. `lfrom this tank the condensation passes through the pipe T to the upper manifold l-I where it is again delivered to the heating coils l through the sight feed tubes K in the manner previously described.

Should condensation form in the lower manifold or be held in the trap Uart it may be discharged into the elevated tankS upon opening the valve Ul and closing the valve U, the steam thus forcing the water of condensation upwardly through the pipe U to the elevated tank. Upon the condensation being forced into the tank the valve Ul may be again closed and the valve 0EL opened.

If desired the condensationV in the trap and lower manifold may be discharged into the sewer through the pipe Uc upon opening the valve Ud. Should the stem pressure become excessive it will be relieved through the blow-off valve Wa. f

Should it become necessary to remove any of the coils for repairs a section of the fury nace front. may be removed whereupon the defective coil may be removed, repaired and replaced.

lflaving thus described my invention what v I claim is l. In an apparatus of thecharaoter described, a plurality of laterallyspaced sets of vertically disposed steam generating coils, a manifold connected with the'lower ends of said coils, vertically disposed prev heating water coils arranged in spaced rela-y tion with the steam generating coils and adapted for connection withV a Vwater main and having inlet ends at the bottom of the apparatus, an'elevated manifold conneoted.

with the pre-heating water coils and with the upper ends of the steamA generating coils, apluralit-y of sight feed tubes respectively in line with the several steam generatingfcoils and their connection with the upper manifold, and valves for regulating the flow through said sight feed tubes.

2. ln an apparatus of the character described, a plurality Vof vertically disposed steam generating coils, a plurality of hori- Zontally disposed baffle plates between the loops of said coils, a manifold connected with the lower ends of the coils, vertically disposed pre-heating water coils adapted for connection with a water main, an elevated manifold connected with the pre-heating water coils and with the upper ends of the steam generating coils, means for regulating the flow from the upper manifold through the steam generating coils, a steam pipe connected to the lower manifold, a valve governing the steam passage through said pipe, a receiving tank elevated above the upper manifold, a return pipe between the receiving tank and the upper manifold, a pipe connection fitted with a vtrap between the lower manifold and the receiving tank and a valve in said pipe connection controlling the passage from the lower manifold to the receiving tank. K

3. In an apparatus ofthe character described, a plurality of vertically disposed steam generating coils, a sectional front for said apparatus adapted to be detached for the removal or replacement ofthe coils, a

manifold connected with the lower end of the coils adjacent to the outer wall of the apparatus, vertically disposed preheating water coils housed within the walls of the apparatus adapted lfor connection with a water main, a manifold elevated above the top of the apparatus connected with the preheating water coils and with the upper ends of the steam generating coils, a plurality of sight feed tubes respectively in line with the several steam generating coils and their connections with the upper manifold, a plurality of valves for regulating the passage through said sight feed tubes, a steam connection between the lower manifold and the heating system, a valve controlling said steam connection, a receiving tank elevated above the upper manifold, a return pipe leading from the heating system to the receiving tank, a pipe connecting the receiving tank with the upper manifold, a pipe y connection fittedl with a trap between the lower manifold and the receiving tank hav`l ing a valve to govern the passage, a valve controlled pipe leading from said trap to a v sewer or other place of discharge and a blow-off valve to relieve. the apparatus of excessive pressure.

In testimony whereof, I sign this speciication.

JOHN R.l EVANS. 

